I think the new device is good news. I can see what you’re saying - the benefit is if Steam Machines expand the PC games market with former console only players. But otherwise the threshold for PC development is already much lower than consoles; there are no dev kit fees, a wide choice of engines to target, relatively greater independence etc.

The steam machine may help somewhat in having a specific hardware profile to target, but the games are still on steam’s store so still have to be able to run widely on Windows or Linux. That’s always been the complexity of PC development - the steam machine doesn’t change that much. Although admittedly the Steam Verified benchmarks are useful for users to simplify understanding what their kit can actually run which will benefit indie devs.